TFTP(1) 						    BSD General Commands Manual 						   TFTP(1)

NAME

     tftp -- trivial file transfer program

SYNOPSIS

     tftp [-e] [host] [port]

DESCRIPTION

     tftp is the user interface to the Internet TFTP (Trivial File Transfer Protocol), which allows users to transfer files to and from a remote
     machine.  The remote host (and optional port) may be specified on the command line, in which case tftp uses host (and port) as the default
     for future transfers (see the connect command below).

     The optional -e argument sets a binary transfer mode as well as setting the extended options as if tout, tsize, and blksize 65464, had been
     given.

     The Multicast TFTP option is supported in open-loop (i.e., "slave-only") mode based on IETF draft-dion-tftp-multicast-option-01.txt (May
     2002), which in turn was based on RFC2026.

COMMANDS

     Once tftp is running, it issues the prompt 'tftp>' and recognizes the following commands:

     ? command-name ...
	      Print help information.

     ascii    Shorthand for "mode ascii"

     binary   Shorthand for "mode binary"

     blksize blk-size
	      Set the tftp blksize option to blk-size octets (8-bit bytes).  Since the number of blocks in a tftp get or put is 65535, the default
	      block size of 512 bytes only allows a maximum of just under 32 megabytes to be transferred.  The value given for blk-size must be
	      between 8 and 65464, inclusive.  Note that many servers will not respect this option.

     connect host-name [port]
	      Set the host (and optionally port) for transfers.  Note that the TFTP protocol, unlike the FTP protocol, does not maintain connec-
	      tions between transfers; thus, the connect command does not actually create a connection, but merely remembers what host is to be
	      used for transfers.  You do not have to use the connect command; the remote host can be specified as part of the get or put com-
	      mands.

     get filename
     get remotename localname
     get file1 file2 ... fileN
	      Get a file or set of files from the specified sources.  Source can be in one of two forms: a filename on the remote host, if the
	      host has already been specified, or a string of the form hosts:filename to specify both a host and filename at the same time.  If
	      the latter form is used, the last hostname specified becomes the default for future transfers.

     mode transfer-mode
	      Set the mode for transfers; transfer-mode may be one of ascii or binary.	The default is ascii.

     put file
     put localfile remotefile
     put file1 file2 ... fileN remote-directory
	      Put a file or set of files to the specified remote file or directory.  The destination can be in one of two forms: a filename on the
	      remote host, if the host has already been specified, or a string of the form hosts:filename to specify both a host and filename at
	      the same time.  If the latter form is used, the hostname specified becomes the default for future transfers.  If the remote-direc-
	      tory form is used, the remote host is assumed to be a UNIX machine.  If you need to specify IPv6 numeric address to hosts, wrap them
	      using square bracket like [hosts]:filename to disambiguate the colon.

     quit     Exit tftp.  An end of file also exits.

     rexmt retransmission-timeout
	      Set the per-packet retransmission timeout, in seconds.

     status   Show current status.

     timeout total-transmission-timeout
	      Set the total transmission timeout, in seconds.

     tout     Toggle the tftp "timeout" option.  If enabled, the client will pass its retransmission-timeout to the server.  Note that many
	      servers will not respect this option.

     trace    Toggle packet tracing.

     tsize    Toggle the tftp "tsize" option.  If enabled, the client will pass and request the filesize of a file at the beginning of a file
	      transfer.  Note that many servers will not respect this option.

     verbose  Toggle verbose mode.

HISTORY

     The tftp command appeared in 4.3BSD.  IPv6 support was implemented by WIDE/KAME project in 1999.  TFTP options were implemented by Wasabi
     Systems, Inc., in 2003, and first appeared in NetBSD 2.0.	Multicast TFTP was implemented by Jared D. McNeill in 2006, and first appeared in
     NetBSD 4.0.

SECURITY CONSIDERATIONS

     Because there is no user-login or validation within the TFTP protocol, the remote site will probably have some sort of file-access restric-
     tions in place.  The exact methods are specific to each site and therefore difficult to document here.

BSD
								   July 23, 2006							       BSD